rrunner.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
   4  *
   5  * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
   6  *
   7  * Thanks to Essential Communication for providing us with hardware
   8  * and very comprehensive documentation without which I would not have
   9  * been able to write this driver. A special thank you to John Gibbon
  10  * for sorting out the legal issues, with the NDA, allowing the code to
  11  * be released under the GPL.
  12  *
  13  * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
  14  * stupid bugs in my code.
  15  *
  16  * Softnet support and various other patches from Val Henson of
  17  * ODS/Essential.
  18  *
  19  * PCI DMA mapping code partly based on work by Francois Romieu.
  20  */
  21
  22
  23 #define DEBUG 1
  24 #define RX_DMA_SKBUFF 1
  25 #define PKT_COPY_THRESHOLD 512
  26
  27 #include <linux/module.h>
  28 #include <linux/types.h>
  29 #include <linux/errno.h>
  30 #include <linux/ioport.h>
  31 #include <linux/pci.h>
  32 #include <linux/kernel.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/hippidevice.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/delay.h>
  37 #include <linux/mm.h>
  38 #include <linux/slab.h>
  39 #include <net/sock.h>
  40
  41 #include <asm/cache.h>
  42 #include <asm/byteorder.h>
  43 #include <asm/io.h>
  44 #include <asm/irq.h>
  45 #include <linux/uaccess.h>
  46
  47 #define rr_if_busy(dev)     netif_queue_stopped(dev)
  48 #define rr_if_running(dev)  netif_running(dev)
  49
  50 #include "rrunner.h"
  51
  52 #define RUN_AT(x) (jiffies + (x))
  53
  54
  55 MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
  56 MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
  57 MODULE_LICENSE("GPL");
  58
  59 static const char version[] =
  60 "rrunner.c: v0.50 11/11/2002  Jes Sorensen (jes@wildopensource.com)\n";
  61
  62
  63 static const struct net_device_ops rr_netdev_ops = {
  64         .ndo_open               = rr_open,
  65         .ndo_stop               = rr_close,
  66         .ndo_siocdevprivate     = rr_siocdevprivate,
  67         .ndo_start_xmit         = rr_start_xmit,
  68         .ndo_set_mac_address    = hippi_mac_addr,
  69 };
  70
  71 /*
  72  * Implementation notes:
  73  *
  74  * The DMA engine only allows for DMA within physical 64KB chunks of
  75  * memory. The current approach of the driver (and stack) is to use
  76  * linear blocks of memory for the skbuffs. However, as the data block
  77  * is always the first part of the skb and skbs are 2^n aligned so we
  78  * are guarantted to get the whole block within one 64KB align 64KB
  79  * chunk.
  80  *
  81  * On the long term, relying on being able to allocate 64KB linear
  82  * chunks of memory is not feasible and the skb handling code and the
  83  * stack will need to know about I/O vectors or something similar.
  84  */
  85
  86 static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  87 {
  88         struct net_device *dev;
  89         static int version_disp;
  90         u8 pci_latency;
  91         struct rr_private *rrpriv;
  92         void *tmpptr;
  93         dma_addr_t ring_dma;
  94         int ret = -ENOMEM;
  95
  96         dev = alloc_hippi_dev(sizeof(struct rr_private));
  97         if (!dev)
  98                 goto out3;
  99
 100         ret = pci_enable_device(pdev);
 101         if (ret) {
 102                 ret = -ENODEV;
 103                 goto out2;
 104         }
 105
 106         rrpriv = netdev_priv(dev);
 107
 108         SET_NETDEV_DEV(dev, &pdev->dev);
 109
 110         ret = pci_request_regions(pdev, "rrunner");
 111         if (ret < 0)
 112                 goto out;
 113
 114         pci_set_drvdata(pdev, dev);
 115
 116         rrpriv->pci_dev = pdev;
 117
 118         spin_lock_init(&rrpriv->lock);
 119
 120         dev->netdev_ops = &rr_netdev_ops;
 121
 122         /* display version info if adapter is found */
 123         if (!version_disp) {
 124                 /* set display flag to TRUE so that */
 125                 /* we only display this string ONCE */
 126                 version_disp = 1;
 127                 printk(version);
 128         }
 129
 130         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
 131         if (pci_latency <= 0x58){
 132                 pci_latency = 0x58;
 133                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
 134         }
 135
 136         pci_set_master(pdev);
 137
 138         printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
 139                "at 0x%llx, irq %i, PCI latency %i\n", dev->name,
 140                (unsigned long long)pci_resource_start(pdev, 0),
 141                pdev->irq, pci_latency);
 142
 143         /*
 144          * Remap the MMIO regs into kernel space.
 145          */
 146         rrpriv->regs = pci_iomap(pdev, 0, 0x1000);
 147         if (!rrpriv->regs) {
 148                 printk(KERN_ERR "%s:  Unable to map I/O register, "
 149                         "RoadRunner will be disabled.\n", dev->name);
 150                 ret = -EIO;
 151                 goto out;
 152         }
 153
 154         tmpptr = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE, &ring_dma,
 155                                     GFP_KERNEL);
 156         rrpriv->tx_ring = tmpptr;
 157         rrpriv->tx_ring_dma = ring_dma;
 158
 159         if (!tmpptr) {
 160                 ret = -ENOMEM;
 161                 goto out;
 162         }
 163
 164         tmpptr = dma_alloc_coherent(&pdev->dev, RX_TOTAL_SIZE, &ring_dma,
 165                                     GFP_KERNEL);
 166         rrpriv->rx_ring = tmpptr;
 167         rrpriv->rx_ring_dma = ring_dma;
 168
 169         if (!tmpptr) {
 170                 ret = -ENOMEM;
 171                 goto out;
 172         }
 173
 174         tmpptr = dma_alloc_coherent(&pdev->dev, EVT_RING_SIZE, &ring_dma,
 175                                     GFP_KERNEL);
 176         rrpriv->evt_ring = tmpptr;
 177         rrpriv->evt_ring_dma = ring_dma;
 178
 179         if (!tmpptr) {
 180                 ret = -ENOMEM;
 181                 goto out;
 182         }
 183
 184         /*
 185          * Don't access any register before this point!
 186          */
 187 #ifdef __BIG_ENDIAN
 188         writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
 189                 &rrpriv->regs->HostCtrl);
 190 #endif
 191         /*
 192          * Need to add a case for little-endian 64-bit hosts here.
 193          */
 194
 195         rr_init(dev);
 196
 197         ret = register_netdev(dev);
 198         if (ret)
 199                 goto out;
 200         return 0;
 201
 202  out:
 203         if (rrpriv->evt_ring)
 204                 dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rrpriv->evt_ring,
 205                                   rrpriv->evt_ring_dma);
 206         if (rrpriv->rx_ring)
 207                 dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rrpriv->rx_ring,
 208                                   rrpriv->rx_ring_dma);
 209         if (rrpriv->tx_ring)
 210                 dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rrpriv->tx_ring,
 211                                   rrpriv->tx_ring_dma);
 212         if (rrpriv->regs)
 213                 pci_iounmap(pdev, rrpriv->regs);
 214         if (pdev)
 215                 pci_release_regions(pdev);
 216         pci_disable_device(pdev);
 217  out2:
 218         free_netdev(dev);
 219  out3:
 220         return ret;
 221 }
 222
 223 static void rr_remove_one(struct pci_dev *pdev)
 224 {
 225         struct net_device *dev = pci_get_drvdata(pdev);
 226         struct rr_private *rr = netdev_priv(dev);
 227
 228         if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)) {
 229                 printk(KERN_ERR "%s: trying to unload running NIC\n",
 230                        dev->name);
 231                 writel(HALT_NIC, &rr->regs->HostCtrl);
 232         }
 233
 234         unregister_netdev(dev);
 235         dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rr->evt_ring,
 236                           rr->evt_ring_dma);
 237         dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rr->rx_ring,
 238                           rr->rx_ring_dma);
 239         dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rr->tx_ring,
 240                           rr->tx_ring_dma);
 241         pci_iounmap(pdev, rr->regs);
 242         pci_release_regions(pdev);
 243         pci_disable_device(pdev);
 244         free_netdev(dev);
 245 }
 246
 247
 248 /*
 249  * Commands are considered to be slow, thus there is no reason to
 250  * inline this.
 251  */
 252 static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
 253 {
 254         struct rr_regs __iomem *regs;
 255         u32 idx;
 256
 257         regs = rrpriv->regs;
 258         /*
 259          * This is temporary - it will go away in the final version.
 260          * We probably also want to make this function inline.
 261          */
 262         if (readl(&regs->HostCtrl) & NIC_HALTED){
 263                 printk("issuing command for halted NIC, code 0x%x, "
 264                        "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
 265                 if (readl(&regs->Mode) & FATAL_ERR)
 266                         printk("error codes Fail1 %02x, Fail2 %02x\n",
 267                                readl(&regs->Fail1), readl(&regs->Fail2));
 268         }
 269
 270         idx = rrpriv->info->cmd_ctrl.pi;
 271
 272         writel(*(u32*)(cmd), &regs->CmdRing[idx]);
 273         wmb();
 274
 275         idx = (idx - 1) % CMD_RING_ENTRIES;
 276         rrpriv->info->cmd_ctrl.pi = idx;
 277         wmb();
 278
 279         if (readl(&regs->Mode) & FATAL_ERR)
 280                 printk("error code %02x\n", readl(&regs->Fail1));
 281 }
 282
 283
 284 /*
 285  * Reset the board in a sensible manner. The NIC is already halted
 286  * when we get here and a spin-lock is held.
 287  */
 288 static int rr_reset(struct net_device *dev)
 289 {
 290         struct rr_private *rrpriv;
 291         struct rr_regs __iomem *regs;
 292         u32 start_pc;
 293         int i;
 294
 295         rrpriv = netdev_priv(dev);
 296         regs = rrpriv->regs;
 297
 298         rr_load_firmware(dev);
 299
 300         writel(0x01000000, &regs->TX_state);
 301         writel(0xff800000, &regs->RX_state);
 302         writel(0, &regs->AssistState);
 303         writel(CLEAR_INTA, &regs->LocalCtrl);
 304         writel(0x01, &regs->BrkPt);
 305         writel(0, &regs->Timer);
 306         writel(0, &regs->TimerRef);
 307         writel(RESET_DMA, &regs->DmaReadState);
 308         writel(RESET_DMA, &regs->DmaWriteState);
 309         writel(0, &regs->DmaWriteHostHi);
 310         writel(0, &regs->DmaWriteHostLo);
 311         writel(0, &regs->DmaReadHostHi);
 312         writel(0, &regs->DmaReadHostLo);
 313         writel(0, &regs->DmaReadLen);
 314         writel(0, &regs->DmaWriteLen);
 315         writel(0, &regs->DmaWriteLcl);
 316         writel(0, &regs->DmaWriteIPchecksum);
 317         writel(0, &regs->DmaReadLcl);
 318         writel(0, &regs->DmaReadIPchecksum);
 319         writel(0, &regs->PciState);
 320 #if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
 321         writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
 322 #elif (BITS_PER_LONG == 64)
 323         writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
 324 #else
 325         writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
 326 #endif
 327
 328 #if 0
 329         /*
 330          * Don't worry, this is just black magic.
 331          */
 332         writel(0xdf000, &regs->RxBase);
 333         writel(0xdf000, &regs->RxPrd);
 334         writel(0xdf000, &regs->RxCon);
 335         writel(0xce000, &regs->TxBase);
 336         writel(0xce000, &regs->TxPrd);
 337         writel(0xce000, &regs->TxCon);
 338         writel(0, &regs->RxIndPro);
 339         writel(0, &regs->RxIndCon);
 340         writel(0, &regs->RxIndRef);
 341         writel(0, &regs->TxIndPro);
 342         writel(0, &regs->TxIndCon);
 343         writel(0, &regs->TxIndRef);
 344         writel(0xcc000, &regs->pad10[0]);
 345         writel(0, &regs->DrCmndPro);
 346         writel(0, &regs->DrCmndCon);
 347         writel(0, &regs->DwCmndPro);
 348         writel(0, &regs->DwCmndCon);
 349         writel(0, &regs->DwCmndRef);
 350         writel(0, &regs->DrDataPro);
 351         writel(0, &regs->DrDataCon);
 352         writel(0, &regs->DrDataRef);
 353         writel(0, &regs->DwDataPro);
 354         writel(0, &regs->DwDataCon);
 355         writel(0, &regs->DwDataRef);
 356 #endif
 357
 358         writel(0xffffffff, &regs->MbEvent);
 359         writel(0, &regs->Event);
 360
 361         writel(0, &regs->TxPi);
 362         writel(0, &regs->IpRxPi);
 363
 364         writel(0, &regs->EvtCon);
 365         writel(0, &regs->EvtPrd);
 366
 367         rrpriv->info->evt_ctrl.pi = 0;
 368
 369         for (i = 0; i < CMD_RING_ENTRIES; i++)
 370                 writel(0, &regs->CmdRing[i]);
 371
 372 /*
 373  * Why 32 ? is this not cache line size dependent?
 374  */
 375         writel(RBURST_64|WBURST_64, &regs->PciState);
 376         wmb();
 377
 378         start_pc = rr_read_eeprom_word(rrpriv,
 379                         offsetof(struct eeprom, rncd_info.FwStart));
 380
 381 #if (DEBUG > 1)
 382         printk("%s: Executing firmware at address 0x%06x\n",
 383                dev->name, start_pc);
 384 #endif
 385
 386         writel(start_pc + 0x800, &regs->Pc);
 387         wmb();
 388         udelay(5);
 389
 390         writel(start_pc, &regs->Pc);
 391         wmb();
 392
 393         return 0;
 394 }
 395
 396
 397 /*
 398  * Read a string from the EEPROM.
 399  */
 400 static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
 401                                 unsigned long offset,
 402                                 unsigned char *buf,
 403                                 unsigned long length)
 404 {
 405         struct rr_regs __iomem *regs = rrpriv->regs;
 406         u32 misc, io, host, i;
 407
 408         io = readl(&regs->ExtIo);
 409         writel(0, &regs->ExtIo);
 410         misc = readl(&regs->LocalCtrl);
 411         writel(0, &regs->LocalCtrl);
 412         host = readl(&regs->HostCtrl);
 413         writel(host | HALT_NIC, &regs->HostCtrl);
 414         mb();
 415
 416         for (i = 0; i < length; i++){
 417                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 418                 mb();
 419                 buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
 420                 mb();
 421         }
 422
 423         writel(host, &regs->HostCtrl);
 424         writel(misc, &regs->LocalCtrl);
 425         writel(io, &regs->ExtIo);
 426         mb();
 427         return i;
 428 }
 429
 430
 431 /*
 432  * Shortcut to read one word (4 bytes) out of the EEPROM and convert
 433  * it to our CPU byte-order.
 434  */
 435 static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
 436                             size_t offset)
 437 {
 438         __be32 word;
 439
 440         if ((rr_read_eeprom(rrpriv, offset,
 441                             (unsigned char *)&word, 4) == 4))
 442                 return be32_to_cpu(word);
 443         return 0;
 444 }
 445
 446
 447 /*
 448  * Write a string to the EEPROM.
 449  *
 450  * This is only called when the firmware is not running.
 451  */
 452 static unsigned int write_eeprom(struct rr_private *rrpriv,
 453                                  unsigned long offset,
 454                                  unsigned char *buf,
 455                                  unsigned long length)
 456 {
 457         struct rr_regs __iomem *regs = rrpriv->regs;
 458         u32 misc, io, data, i, j, ready, error = 0;
 459
 460         io = readl(&regs->ExtIo);
 461         writel(0, &regs->ExtIo);
 462         misc = readl(&regs->LocalCtrl);
 463         writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
 464         mb();
 465
 466         for (i = 0; i < length; i++){
 467                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 468                 mb();
 469                 data = buf[i] << 24;
 470                 /*
 471                  * Only try to write the data if it is not the same
 472                  * value already.
 473                  */
 474                 if ((readl(&regs->WinData) & 0xff000000) != data){
 475                         writel(data, &regs->WinData);
 476                         ready = 0;
 477                         j = 0;
 478                         mb();
 479                         while(!ready){
 480                                 udelay(20);
 481                                 if ((readl(&regs->WinData) & 0xff000000) ==
 482                                     data)
 483                                         ready = 1;
 484                                 mb();
 485                                 if (j++ > 5000){
 486                                         printk("data mismatch: %08x, "
 487                                                "WinData %08x\n", data,
 488                                                readl(&regs->WinData));
 489                                         ready = 1;
 490                                         error = 1;
 491                                 }
 492                         }
 493                 }
 494         }
 495
 496         writel(misc, &regs->LocalCtrl);
 497         writel(io, &regs->ExtIo);
 498         mb();
 499
 500         return error;
 501 }
 502
 503
 504 static int rr_init(struct net_device *dev)
 505 {
 506         u8 addr[HIPPI_ALEN] __aligned(4);
 507         struct rr_private *rrpriv;
 508         struct rr_regs __iomem *regs;
 509         u32 sram_size, rev;
 510
 511         rrpriv = netdev_priv(dev);
 512         regs = rrpriv->regs;
 513
 514         rev = readl(&regs->FwRev);
 515         rrpriv->fw_rev = rev;
 516         if (rev > 0x00020024)
 517                 printk("  Firmware revision: %i.%i.%i\n", (rev >> 16),
 518                        ((rev >> 8) & 0xff), (rev & 0xff));
 519         else if (rev >= 0x00020000) {
 520                 printk("  Firmware revision: %i.%i.%i (2.0.37 or "
 521                        "later is recommended)\n", (rev >> 16),
 522                        ((rev >> 8) & 0xff), (rev & 0xff));
 523         }else{
 524                 printk("  Firmware revision too old: %i.%i.%i, please "
 525                        "upgrade to 2.0.37 or later.\n",
 526                        (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
 527         }
 528
 529 #if (DEBUG > 2)
 530         printk("  Maximum receive rings %i\n", readl(&regs->MaxRxRng));
 531 #endif
 532
 533         /*
 534          * Read the hardware address from the eeprom.  The HW address
 535          * is not really necessary for HIPPI but awfully convenient.
 536          * The pointer arithmetic to put it in dev_addr is ugly, but
 537          * Donald Becker does it this way for the GigE version of this
 538          * card and it's shorter and more portable than any
 539          * other method I've seen.  -VAL
 540          */
 541
 542         *(__be16 *)(addr) =
 543           htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA)));
 544         *(__be32 *)(addr+2) =
 545           htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4])));
 546         dev_addr_set(dev, addr);
 547
 548         printk("  MAC: %pM\n", dev->dev_addr);
 549
 550         sram_size = rr_read_eeprom_word(rrpriv, 8);
 551         printk("  SRAM size 0x%06x\n", sram_size);
 552
 553         return 0;
 554 }
 555
 556
 557 static int rr_init1(struct net_device *dev)
 558 {
 559         struct rr_private *rrpriv;
 560         struct rr_regs __iomem *regs;
 561         unsigned long myjif, flags;
 562         struct cmd cmd;
 563         u32 hostctrl;
 564         int ecode = 0;
 565         short i;
 566
 567         rrpriv = netdev_priv(dev);
 568         regs = rrpriv->regs;
 569
 570         spin_lock_irqsave(&rrpriv->lock, flags);
 571
 572         hostctrl = readl(&regs->HostCtrl);
 573         writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
 574         wmb();
 575
 576         if (hostctrl & PARITY_ERR){
 577                 printk("%s: Parity error halting NIC - this is serious!\n",
 578                        dev->name);
 579                 spin_unlock_irqrestore(&rrpriv->lock, flags);
 580                 ecode = -EFAULT;
 581                 goto error;
 582         }
 583
 584         set_rxaddr(regs, rrpriv->rx_ctrl_dma);
 585         set_infoaddr(regs, rrpriv->info_dma);
 586
 587         rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
 588         rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
 589         rrpriv->info->evt_ctrl.mode = 0;
 590         rrpriv->info->evt_ctrl.pi = 0;
 591         set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
 592
 593         rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
 594         rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
 595         rrpriv->info->cmd_ctrl.mode = 0;
 596         rrpriv->info->cmd_ctrl.pi = 15;
 597
 598         for (i = 0; i < CMD_RING_ENTRIES; i++) {
 599                 writel(0, &regs->CmdRing[i]);
 600         }
 601
 602         for (i = 0; i < TX_RING_ENTRIES; i++) {
 603                 rrpriv->tx_ring[i].size = 0;
 604                 set_rraddr(&rrpriv->tx_ring[i].addr, 0);
 605                 rrpriv->tx_skbuff[i] = NULL;
 606         }
 607         rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
 608         rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
 609         rrpriv->info->tx_ctrl.mode = 0;
 610         rrpriv->info->tx_ctrl.pi = 0;
 611         set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
 612
 613         /*
 614          * Set dirty_tx before we start receiving interrupts, otherwise
 615          * the interrupt handler might think it is supposed to process
 616          * tx ints before we are up and running, which may cause a null
 617          * pointer access in the int handler.
 618          */
 619         rrpriv->tx_full = 0;
 620         rrpriv->cur_rx = 0;
 621         rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
 622
 623         rr_reset(dev);
 624
 625         /* Tuning values */
 626         writel(0x5000, &regs->ConRetry);
 627         writel(0x100, &regs->ConRetryTmr);
 628         writel(0x500000, &regs->ConTmout);
 629         writel(0x60, &regs->IntrTmr);
 630         writel(0x500000, &regs->TxDataMvTimeout);
 631         writel(0x200000, &regs->RxDataMvTimeout);
 632         writel(0x80, &regs->WriteDmaThresh);
 633         writel(0x80, &regs->ReadDmaThresh);
 634
 635         rrpriv->fw_running = 0;
 636         wmb();
 637
 638         hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
 639         writel(hostctrl, &regs->HostCtrl);
 640         wmb();
 641
 642         spin_unlock_irqrestore(&rrpriv->lock, flags);
 643
 644         for (i = 0; i < RX_RING_ENTRIES; i++) {
 645                 struct sk_buff *skb;
 646                 dma_addr_t addr;
 647
 648                 rrpriv->rx_ring[i].mode = 0;
 649                 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
 650                 if (!skb) {
 651                         printk(KERN_WARNING "%s: Unable to allocate memory "
 652                                "for receive ring - halting NIC\n", dev->name);
 653                         ecode = -ENOMEM;
 654                         goto error;
 655                 }
 656                 rrpriv->rx_skbuff[i] = skb;
 657                 addr = dma_map_single(&rrpriv->pci_dev->dev, skb->data,
 658                                       dev->mtu + HIPPI_HLEN, DMA_FROM_DEVICE);
 659                 /*
 660                  * Sanity test to see if we conflict with the DMA
 661                  * limitations of the Roadrunner.
 662                  */
 663                 if ((((unsigned long)skb->data) & 0xfff) > ~65320)
 664                         printk("skb alloc error\n");
 665
 666                 set_rraddr(&rrpriv->rx_ring[i].addr, addr);
 667                 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
 668         }
 669
 670         rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
 671         rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
 672         rrpriv->rx_ctrl[4].mode = 8;
 673         rrpriv->rx_ctrl[4].pi = 0;
 674         wmb();
 675         set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
 676
 677         udelay(1000);
 678
 679         /*
 680          * Now start the FirmWare.
 681          */
 682         cmd.code = C_START_FW;
 683         cmd.ring = 0;
 684         cmd.index = 0;
 685
 686         rr_issue_cmd(rrpriv, &cmd);
 687
 688         /*
 689          * Give the FirmWare time to chew on the `get running' command.
 690          */
 691         myjif = jiffies + 5 * HZ;
 692         while (time_before(jiffies, myjif) && !rrpriv->fw_running)
 693                 cpu_relax();
 694
 695         netif_start_queue(dev);
 696
 697         return ecode;
 698
 699  error:
 700         /*
 701          * We might have gotten here because we are out of memory,
 702          * make sure we release everything we allocated before failing
 703          */
 704         for (i = 0; i < RX_RING_ENTRIES; i++) {
 705                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
 706
 707                 if (skb) {
 708                         dma_unmap_single(&rrpriv->pci_dev->dev,
 709                                          rrpriv->rx_ring[i].addr.addrlo,
 710                                          dev->mtu + HIPPI_HLEN,
 711                                          DMA_FROM_DEVICE);
 712                         rrpriv->rx_ring[i].size = 0;
 713                         set_rraddr(&rrpriv->rx_ring[i].addr, 0);
 714                         dev_kfree_skb(skb);
 715                         rrpriv->rx_skbuff[i] = NULL;
 716                 }
 717         }
 718         return ecode;
 719 }
 720
 721
 722 /*
 723  * All events are considered to be slow (RX/TX ints do not generate
 724  * events) and are handled here, outside the main interrupt handler,
 725  * to reduce the size of the handler.
 726  */
 727 static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
 728 {
 729         struct rr_private *rrpriv;
 730         struct rr_regs __iomem *regs;
 731         u32 tmp;
 732
 733         rrpriv = netdev_priv(dev);
 734         regs = rrpriv->regs;
 735
 736         while (prodidx != eidx){
 737                 switch (rrpriv->evt_ring[eidx].code){
 738                 case E_NIC_UP:
 739                         tmp = readl(&regs->FwRev);
 740                         printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
 741                                "up and running\n", dev->name,
 742                                (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
 743                         rrpriv->fw_running = 1;
 744                         writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
 745                         wmb();
 746                         break;
 747                 case E_LINK_ON:
 748                         printk(KERN_INFO "%s: Optical link ON\n", dev->name);
 749                         break;
 750                 case E_LINK_OFF:
 751                         printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
 752                         break;
 753                 case E_RX_IDLE:
 754                         printk(KERN_WARNING "%s: RX data not moving\n",
 755                                dev->name);
 756                         goto drop;
 757                 case E_WATCHDOG:
 758                         printk(KERN_INFO "%s: The watchdog is here to see "
 759                                "us\n", dev->name);
 760                         break;
 761                 case E_INTERN_ERR:
 762                         printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
 763                                dev->name);
 764                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 765                                &regs->HostCtrl);
 766                         wmb();
 767                         break;
 768                 case E_HOST_ERR:
 769                         printk(KERN_ERR "%s: Host software error\n",
 770                                dev->name);
 771                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 772                                &regs->HostCtrl);
 773                         wmb();
 774                         break;
 775                 /*
 776                  * TX events.
 777                  */
 778                 case E_CON_REJ:
 779                         printk(KERN_WARNING "%s: Connection rejected\n",
 780                                dev->name);
 781                         dev->stats.tx_aborted_errors++;
 782                         break;
 783                 case E_CON_TMOUT:
 784                         printk(KERN_WARNING "%s: Connection timeout\n",
 785                                dev->name);
 786                         break;
 787                 case E_DISC_ERR:
 788                         printk(KERN_WARNING "%s: HIPPI disconnect error\n",
 789                                dev->name);
 790                         dev->stats.tx_aborted_errors++;
 791                         break;
 792                 case E_INT_PRTY:
 793                         printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
 794                                dev->name);
 795                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 796                                &regs->HostCtrl);
 797                         wmb();
 798                         break;
 799                 case E_TX_IDLE:
 800                         printk(KERN_WARNING "%s: Transmitter idle\n",
 801                                dev->name);
 802                         break;
 803                 case E_TX_LINK_DROP:
 804                         printk(KERN_WARNING "%s: Link lost during transmit\n",
 805                                dev->name);
 806                         dev->stats.tx_aborted_errors++;
 807                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 808                                &regs->HostCtrl);
 809                         wmb();
 810                         break;
 811                 case E_TX_INV_RNG:
 812                         printk(KERN_ERR "%s: Invalid send ring block\n",
 813                                dev->name);
 814                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 815                                &regs->HostCtrl);
 816                         wmb();
 817                         break;
 818                 case E_TX_INV_BUF:
 819                         printk(KERN_ERR "%s: Invalid send buffer address\n",
 820                                dev->name);
 821                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 822                                &regs->HostCtrl);
 823                         wmb();
 824                         break;
 825                 case E_TX_INV_DSC:
 826                         printk(KERN_ERR "%s: Invalid descriptor address\n",
 827                                dev->name);
 828                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 829                                &regs->HostCtrl);
 830                         wmb();
 831                         break;
 832                 /*
 833                  * RX events.
 834                  */
 835                 case E_RX_RNG_OUT:
 836                         printk(KERN_INFO "%s: Receive ring full\n", dev->name);
 837                         break;
 838
 839                 case E_RX_PAR_ERR:
 840                         printk(KERN_WARNING "%s: Receive parity error\n",
 841                                dev->name);
 842                         goto drop;
 843                 case E_RX_LLRC_ERR:
 844                         printk(KERN_WARNING "%s: Receive LLRC error\n",
 845                                dev->name);
 846                         goto drop;
 847                 case E_PKT_LN_ERR:
 848                         printk(KERN_WARNING "%s: Receive packet length "
 849                                "error\n", dev->name);
 850                         goto drop;
 851                 case E_DTA_CKSM_ERR:
 852                         printk(KERN_WARNING "%s: Data checksum error\n",
 853                                dev->name);
 854                         goto drop;
 855                 case E_SHT_BST:
 856                         printk(KERN_WARNING "%s: Unexpected short burst "
 857                                "error\n", dev->name);
 858                         goto drop;
 859                 case E_STATE_ERR:
 860                         printk(KERN_WARNING "%s: Recv. state transition"
 861                                " error\n", dev->name);
 862                         goto drop;
 863                 case E_UNEXP_DATA:
 864                         printk(KERN_WARNING "%s: Unexpected data error\n",
 865                                dev->name);
 866                         goto drop;
 867                 case E_LST_LNK_ERR:
 868                         printk(KERN_WARNING "%s: Link lost error\n",
 869                                dev->name);
 870                         goto drop;
 871                 case E_FRM_ERR:
 872                         printk(KERN_WARNING "%s: Framing Error\n",
 873                                dev->name);
 874                         goto drop;
 875                 case E_FLG_SYN_ERR:
 876                         printk(KERN_WARNING "%s: Flag sync. lost during "
 877                                "packet\n", dev->name);
 878                         goto drop;
 879                 case E_RX_INV_BUF:
 880                         printk(KERN_ERR "%s: Invalid receive buffer "
 881                                "address\n", dev->name);
 882                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 883                                &regs->HostCtrl);
 884                         wmb();
 885                         break;
 886                 case E_RX_INV_DSC:
 887                         printk(KERN_ERR "%s: Invalid receive descriptor "
 888                                "address\n", dev->name);
 889                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 890                                &regs->HostCtrl);
 891                         wmb();
 892                         break;
 893                 case E_RNG_BLK:
 894                         printk(KERN_ERR "%s: Invalid ring block\n",
 895                                dev->name);
 896                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 897                                &regs->HostCtrl);
 898                         wmb();
 899                         break;
 900                 drop:
 901                         /* Label packet to be dropped.
 902                          * Actual dropping occurs in rx
 903                          * handling.
 904                          *
 905                          * The index of packet we get to drop is
 906                          * the index of the packet following
 907                          * the bad packet. -kbf
 908                          */
 909                         {
 910                                 u16 index = rrpriv->evt_ring[eidx].index;
 911                                 index = (index + (RX_RING_ENTRIES - 1)) %
 912                                         RX_RING_ENTRIES;
 913                                 rrpriv->rx_ring[index].mode |=
 914                                         (PACKET_BAD | PACKET_END);
 915                         }
 916                         break;
 917                 default:
 918                         printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
 919                                dev->name, rrpriv->evt_ring[eidx].code);
 920                 }
 921                 eidx = (eidx + 1) % EVT_RING_ENTRIES;
 922         }
 923
 924         rrpriv->info->evt_ctrl.pi = eidx;
 925         wmb();
 926         return eidx;
 927 }
 928
 929
 930 static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
 931 {
 932         struct rr_private *rrpriv = netdev_priv(dev);
 933         struct rr_regs __iomem *regs = rrpriv->regs;
 934
 935         do {
 936                 struct rx_desc *desc;
 937                 u32 pkt_len;
 938
 939                 desc = &(rrpriv->rx_ring[index]);
 940                 pkt_len = desc->size;
 941 #if (DEBUG > 2)
 942                 printk("index %i, rxlimit %i\n", index, rxlimit);
 943                 printk("len %x, mode %x\n", pkt_len, desc->mode);
 944 #endif
 945                 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
 946                         dev->stats.rx_dropped++;
 947                         goto defer;
 948                 }
 949
 950                 if (pkt_len > 0){
 951                         struct sk_buff *skb, *rx_skb;
 952
 953                         rx_skb = rrpriv->rx_skbuff[index];
 954
 955                         if (pkt_len < PKT_COPY_THRESHOLD) {
 956                                 skb = alloc_skb(pkt_len, GFP_ATOMIC);
 957                                 if (skb == NULL){
 958                                         printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
 959                                         dev->stats.rx_dropped++;
 960                                         goto defer;
 961                                 } else {
 962                                         dma_sync_single_for_cpu(&rrpriv->pci_dev->dev,
 963                                                                 desc->addr.addrlo,
 964                                                                 pkt_len,
 965                                                                 DMA_FROM_DEVICE);
 966
 967                                         skb_put_data(skb, rx_skb->data,
 968                                                      pkt_len);
 969
 970                                         dma_sync_single_for_device(&rrpriv->pci_dev->dev,
 971                                                                    desc->addr.addrlo,
 972                                                                    pkt_len,
 973                                                                    DMA_FROM_DEVICE);
 974                                 }
 975                         }else{
 976                                 struct sk_buff *newskb;
 977
 978                                 newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
 979                                         GFP_ATOMIC);
 980                                 if (newskb){
 981                                         dma_addr_t addr;
 982
 983                                         dma_unmap_single(&rrpriv->pci_dev->dev,
 984                                                          desc->addr.addrlo,
 985                                                          dev->mtu + HIPPI_HLEN,
 986                                                          DMA_FROM_DEVICE);
 987                                         skb = rx_skb;
 988                                         skb_put(skb, pkt_len);
 989                                         rrpriv->rx_skbuff[index] = newskb;
 990                                         addr = dma_map_single(&rrpriv->pci_dev->dev,
 991                                                               newskb->data,
 992                                                               dev->mtu + HIPPI_HLEN,
 993                                                               DMA_FROM_DEVICE);
 994                                         set_rraddr(&desc->addr, addr);
 995                                 } else {
 996                                         printk("%s: Out of memory, deferring "
 997                                                "packet\n", dev->name);
 998                                         dev->stats.rx_dropped++;
 999                                         goto defer;
1000                                 }
1001                         }
1002                         skb->protocol = hippi_type_trans(skb, dev);
1003
1004                         netif_rx(skb);          /* send it up */
1005
1006                         dev->stats.rx_packets++;
1007                         dev->stats.rx_bytes += pkt_len;
1008                 }
1009         defer:
1010                 desc->mode = 0;
1011                 desc->size = dev->mtu + HIPPI_HLEN;
1012
1013                 if ((index & 7) == 7)
1014                         writel(index, &regs->IpRxPi);
1015
1016                 index = (index + 1) % RX_RING_ENTRIES;
1017         } while(index != rxlimit);
1018
1019         rrpriv->cur_rx = index;
1020         wmb();
1021 }
1022
1023
1024 static irqreturn_t rr_interrupt(int irq, void *dev_id)
1025 {
1026         struct rr_private *rrpriv;
1027         struct rr_regs __iomem *regs;
1028         struct net_device *dev = (struct net_device *)dev_id;
1029         u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1030
1031         rrpriv = netdev_priv(dev);
1032         regs = rrpriv->regs;
1033
1034         if (!(readl(&regs->HostCtrl) & RR_INT))
1035                 return IRQ_NONE;
1036
1037         spin_lock(&rrpriv->lock);
1038
1039         prodidx = readl(&regs->EvtPrd);
1040         txcsmr = (prodidx >> 8) & 0xff;
1041         rxlimit = (prodidx >> 16) & 0xff;
1042         prodidx &= 0xff;
1043
1044 #if (DEBUG > 2)
1045         printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1046                prodidx, rrpriv->info->evt_ctrl.pi);
1047 #endif
1048         /*
1049          * Order here is important.  We must handle events
1050          * before doing anything else in order to catch
1051          * such things as LLRC errors, etc -kbf
1052          */
1053
1054         eidx = rrpriv->info->evt_ctrl.pi;
1055         if (prodidx != eidx)
1056                 eidx = rr_handle_event(dev, prodidx, eidx);
1057
1058         rxindex = rrpriv->cur_rx;
1059         if (rxindex != rxlimit)
1060                 rx_int(dev, rxlimit, rxindex);
1061
1062         txcon = rrpriv->dirty_tx;
1063         if (txcsmr != txcon) {
1064                 do {
1065                         /* Due to occational firmware TX producer/consumer out
1066                          * of sync. error need to check entry in ring -kbf
1067                          */
1068                         if(rrpriv->tx_skbuff[txcon]){
1069                                 struct tx_desc *desc;
1070                                 struct sk_buff *skb;
1071
1072                                 desc = &(rrpriv->tx_ring[txcon]);
1073                                 skb = rrpriv->tx_skbuff[txcon];
1074
1075                                 dev->stats.tx_packets++;
1076                                 dev->stats.tx_bytes += skb->len;
1077
1078                                 dma_unmap_single(&rrpriv->pci_dev->dev,
1079                                                  desc->addr.addrlo, skb->len,
1080                                                  DMA_TO_DEVICE);
1081                                 dev_kfree_skb_irq(skb);
1082
1083                                 rrpriv->tx_skbuff[txcon] = NULL;
1084                                 desc->size = 0;
1085                                 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1086                                 desc->mode = 0;
1087                         }
1088                         txcon = (txcon + 1) % TX_RING_ENTRIES;
1089                 } while (txcsmr != txcon);
1090                 wmb();
1091
1092                 rrpriv->dirty_tx = txcon;
1093                 if (rrpriv->tx_full && rr_if_busy(dev) &&
1094                     (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1095                      != rrpriv->dirty_tx)){
1096                         rrpriv->tx_full = 0;
1097                         netif_wake_queue(dev);
1098                 }
1099         }
1100
1101         eidx |= ((txcsmr << 8) | (rxlimit << 16));
1102         writel(eidx, &regs->EvtCon);
1103         wmb();
1104
1105         spin_unlock(&rrpriv->lock);
1106         return IRQ_HANDLED;
1107 }
1108
1109 static inline void rr_raz_tx(struct rr_private *rrpriv,
1110                              struct net_device *dev)
1111 {
1112         int i;
1113
1114         for (i = 0; i < TX_RING_ENTRIES; i++) {
1115                 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1116
1117                 if (skb) {
1118                         struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1119
1120                         dma_unmap_single(&rrpriv->pci_dev->dev,
1121                                          desc->addr.addrlo, skb->len,
1122                                          DMA_TO_DEVICE);
1123                         desc->size = 0;
1124                         set_rraddr(&desc->addr, 0);
1125                         dev_kfree_skb(skb);
1126                         rrpriv->tx_skbuff[i] = NULL;
1127                 }
1128         }
1129 }
1130
1131
1132 static inline void rr_raz_rx(struct rr_private *rrpriv,
1133                              struct net_device *dev)
1134 {
1135         int i;
1136
1137         for (i = 0; i < RX_RING_ENTRIES; i++) {
1138                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
1139
1140                 if (skb) {
1141                         struct rx_desc *desc = &(rrpriv->rx_ring[i]);
1142
1143                         dma_unmap_single(&rrpriv->pci_dev->dev,
1144                                          desc->addr.addrlo,
1145                                          dev->mtu + HIPPI_HLEN,
1146                                          DMA_FROM_DEVICE);
1147                         desc->size = 0;
1148                         set_rraddr(&desc->addr, 0);
1149                         dev_kfree_skb(skb);
1150                         rrpriv->rx_skbuff[i] = NULL;
1151                 }
1152         }
1153 }
1154
1155 static void rr_timer(struct timer_list *t)
1156 {
1157         struct rr_private *rrpriv = from_timer(rrpriv, t, timer);
1158         struct net_device *dev = pci_get_drvdata(rrpriv->pci_dev);
1159         struct rr_regs __iomem *regs = rrpriv->regs;
1160         unsigned long flags;
1161
1162         if (readl(&regs->HostCtrl) & NIC_HALTED){
1163                 printk("%s: Restarting nic\n", dev->name);
1164                 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1165                 memset(rrpriv->info, 0, sizeof(struct rr_info));
1166                 wmb();
1167
1168                 rr_raz_tx(rrpriv, dev);
1169                 rr_raz_rx(rrpriv, dev);
1170
1171                 if (rr_init1(dev)) {
1172                         spin_lock_irqsave(&rrpriv->lock, flags);
1173                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1174                                &regs->HostCtrl);
1175                         spin_unlock_irqrestore(&rrpriv->lock, flags);
1176                 }
1177         }
1178         rrpriv->timer.expires = RUN_AT(5*HZ);
1179         add_timer(&rrpriv->timer);
1180 }
1181
1182
1183 static int rr_open(struct net_device *dev)
1184 {
1185         struct rr_private *rrpriv = netdev_priv(dev);
1186         struct pci_dev *pdev = rrpriv->pci_dev;
1187         struct rr_regs __iomem *regs;
1188         int ecode = 0;
1189         unsigned long flags;
1190         dma_addr_t dma_addr;
1191
1192         regs = rrpriv->regs;
1193
1194         if (rrpriv->fw_rev < 0x00020000) {
1195                 printk(KERN_WARNING "%s: trying to configure device with "
1196                        "obsolete firmware\n", dev->name);
1197                 ecode = -EBUSY;
1198                 goto error;
1199         }
1200
1201         rrpriv->rx_ctrl = dma_alloc_coherent(&pdev->dev,
1202                                              256 * sizeof(struct ring_ctrl),
1203                                              &dma_addr, GFP_KERNEL);
1204         if (!rrpriv->rx_ctrl) {
1205                 ecode = -ENOMEM;
1206                 goto error;
1207         }
1208         rrpriv->rx_ctrl_dma = dma_addr;
1209
1210         rrpriv->info = dma_alloc_coherent(&pdev->dev, sizeof(struct rr_info),
1211                                           &dma_addr, GFP_KERNEL);
1212         if (!rrpriv->info) {
1213                 ecode = -ENOMEM;
1214                 goto error;
1215         }
1216         rrpriv->info_dma = dma_addr;
1217         wmb();
1218
1219         spin_lock_irqsave(&rrpriv->lock, flags);
1220         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1221         readl(&regs->HostCtrl);
1222         spin_unlock_irqrestore(&rrpriv->lock, flags);
1223
1224         if (request_irq(pdev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) {
1225                 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1226                        dev->name, pdev->irq);
1227                 ecode = -EAGAIN;
1228                 goto error;
1229         }
1230
1231         if ((ecode = rr_init1(dev)))
1232                 goto error;
1233
1234         /* Set the timer to switch to check for link beat and perhaps switch
1235            to an alternate media type. */
1236         timer_setup(&rrpriv->timer, rr_timer, 0);
1237         rrpriv->timer.expires = RUN_AT(5*HZ);           /* 5 sec. watchdog */
1238         add_timer(&rrpriv->timer);
1239
1240         netif_start_queue(dev);
1241
1242         return ecode;
1243
1244  error:
1245         spin_lock_irqsave(&rrpriv->lock, flags);
1246         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1247         spin_unlock_irqrestore(&rrpriv->lock, flags);
1248
1249         if (rrpriv->info) {
1250                 dma_free_coherent(&pdev->dev, sizeof(struct rr_info),
1251                                   rrpriv->info, rrpriv->info_dma);
1252                 rrpriv->info = NULL;
1253         }
1254         if (rrpriv->rx_ctrl) {
1255                 dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl),
1256                                   rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1257                 rrpriv->rx_ctrl = NULL;
1258         }
1259
1260         netif_stop_queue(dev);
1261
1262         return ecode;
1263 }
1264
1265
1266 static void rr_dump(struct net_device *dev)
1267 {
1268         struct rr_private *rrpriv;
1269         struct rr_regs __iomem *regs;
1270         u32 index, cons;
1271         short i;
1272         int len;
1273
1274         rrpriv = netdev_priv(dev);
1275         regs = rrpriv->regs;
1276
1277         printk("%s: dumping NIC TX rings\n", dev->name);
1278
1279         printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1280                readl(&regs->RxPrd), readl(&regs->TxPrd),
1281                readl(&regs->EvtPrd), readl(&regs->TxPi),
1282                rrpriv->info->tx_ctrl.pi);
1283
1284         printk("Error code 0x%x\n", readl(&regs->Fail1));
1285
1286         index = (((readl(&regs->EvtPrd) >> 8) & 0xff) - 1) % TX_RING_ENTRIES;
1287         cons = rrpriv->dirty_tx;
1288         printk("TX ring index %i, TX consumer %i\n",
1289                index, cons);
1290
1291         if (rrpriv->tx_skbuff[index]){
1292                 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1293                 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1294                 for (i = 0; i < len; i++){
1295                         if (!(i & 7))
1296                                 printk("\n");
1297                         printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1298                 }
1299                 printk("\n");
1300         }
1301
1302         if (rrpriv->tx_skbuff[cons]){
1303                 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1304                 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1305                 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %p, truesize 0x%x\n",
1306                        rrpriv->tx_ring[cons].mode,
1307                        rrpriv->tx_ring[cons].size,
1308                        (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1309                        rrpriv->tx_skbuff[cons]->data,
1310                        (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1311                 for (i = 0; i < len; i++){
1312                         if (!(i & 7))
1313                                 printk("\n");
1314                         printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1315                 }
1316                 printk("\n");
1317         }
1318
1319         printk("dumping TX ring info:\n");
1320         for (i = 0; i < TX_RING_ENTRIES; i++)
1321                 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1322                        rrpriv->tx_ring[i].mode,
1323                        rrpriv->tx_ring[i].size,
1324                        (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1325
1326 }
1327
1328
1329 static int rr_close(struct net_device *dev)
1330 {
1331         struct rr_private *rrpriv = netdev_priv(dev);
1332         struct rr_regs __iomem *regs = rrpriv->regs;
1333         struct pci_dev *pdev = rrpriv->pci_dev;
1334         unsigned long flags;
1335         u32 tmp;
1336         short i;
1337
1338         netif_stop_queue(dev);
1339
1340
1341         /*
1342          * Lock to make sure we are not cleaning up while another CPU
1343          * is handling interrupts.
1344          */
1345         spin_lock_irqsave(&rrpriv->lock, flags);
1346
1347         tmp = readl(&regs->HostCtrl);
1348         if (tmp & NIC_HALTED){
1349                 printk("%s: NIC already halted\n", dev->name);
1350                 rr_dump(dev);
1351         }else{
1352                 tmp |= HALT_NIC | RR_CLEAR_INT;
1353                 writel(tmp, &regs->HostCtrl);
1354                 readl(&regs->HostCtrl);
1355         }
1356
1357         rrpriv->fw_running = 0;
1358
1359         spin_unlock_irqrestore(&rrpriv->lock, flags);
1360         del_timer_sync(&rrpriv->timer);
1361         spin_lock_irqsave(&rrpriv->lock, flags);
1362
1363         writel(0, &regs->TxPi);
1364         writel(0, &regs->IpRxPi);
1365
1366         writel(0, &regs->EvtCon);
1367         writel(0, &regs->EvtPrd);
1368
1369         for (i = 0; i < CMD_RING_ENTRIES; i++)
1370                 writel(0, &regs->CmdRing[i]);
1371
1372         rrpriv->info->tx_ctrl.entries = 0;
1373         rrpriv->info->cmd_ctrl.pi = 0;
1374         rrpriv->info->evt_ctrl.pi = 0;
1375         rrpriv->rx_ctrl[4].entries = 0;
1376
1377         rr_raz_tx(rrpriv, dev);
1378         rr_raz_rx(rrpriv, dev);
1379
1380         dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl),
1381                           rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1382         rrpriv->rx_ctrl = NULL;
1383
1384         dma_free_coherent(&pdev->dev, sizeof(struct rr_info), rrpriv->info,
1385                           rrpriv->info_dma);
1386         rrpriv->info = NULL;
1387
1388         spin_unlock_irqrestore(&rrpriv->lock, flags);
1389         free_irq(pdev->irq, dev);
1390
1391         return 0;
1392 }
1393
1394
1395 static netdev_tx_t rr_start_xmit(struct sk_buff *skb,
1396                                  struct net_device *dev)
1397 {
1398         struct rr_private *rrpriv = netdev_priv(dev);
1399         struct rr_regs __iomem *regs = rrpriv->regs;
1400         struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
1401         struct ring_ctrl *txctrl;
1402         unsigned long flags;
1403         u32 index, len = skb->len;
1404         u32 *ifield;
1405         struct sk_buff *new_skb;
1406
1407         if (readl(&regs->Mode) & FATAL_ERR)
1408                 printk("error codes Fail1 %02x, Fail2 %02x\n",
1409                        readl(&regs->Fail1), readl(&regs->Fail2));
1410
1411         /*
1412          * We probably need to deal with tbusy here to prevent overruns.
1413          */
1414
1415         if (skb_headroom(skb) < 8){
1416                 printk("incoming skb too small - reallocating\n");
1417                 if (!(new_skb = dev_alloc_skb(len + 8))) {
1418                         dev_kfree_skb(skb);
1419                         netif_wake_queue(dev);
1420                         return NETDEV_TX_OK;
1421                 }
1422                 skb_reserve(new_skb, 8);
1423                 skb_put(new_skb, len);
1424                 skb_copy_from_linear_data(skb, new_skb->data, len);
1425                 dev_kfree_skb(skb);
1426                 skb = new_skb;
1427         }
1428
1429         ifield = skb_push(skb, 8);
1430
1431         ifield[0] = 0;
1432         ifield[1] = hcb->ifield;
1433
1434         /*
1435          * We don't need the lock before we are actually going to start
1436          * fiddling with the control blocks.
1437          */
1438         spin_lock_irqsave(&rrpriv->lock, flags);
1439
1440         txctrl = &rrpriv->info->tx_ctrl;
1441
1442         index = txctrl->pi;
1443
1444         rrpriv->tx_skbuff[index] = skb;
1445         set_rraddr(&rrpriv->tx_ring[index].addr,
1446                    dma_map_single(&rrpriv->pci_dev->dev, skb->data, len + 8, DMA_TO_DEVICE));
1447         rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
1448         rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
1449         txctrl->pi = (index + 1) % TX_RING_ENTRIES;
1450         wmb();
1451         writel(txctrl->pi, &regs->TxPi);
1452
1453         if (txctrl->pi == rrpriv->dirty_tx){
1454                 rrpriv->tx_full = 1;
1455                 netif_stop_queue(dev);
1456         }
1457
1458         spin_unlock_irqrestore(&rrpriv->lock, flags);
1459
1460         return NETDEV_TX_OK;
1461 }
1462
1463
1464 /*
1465  * Read the firmware out of the EEPROM and put it into the SRAM
1466  * (or from user space - later)
1467  *
1468  * This operation requires the NIC to be halted and is performed with
1469  * interrupts disabled and with the spinlock hold.
1470  */
1471 static int rr_load_firmware(struct net_device *dev)
1472 {
1473         struct rr_private *rrpriv;
1474         struct rr_regs __iomem *regs;
1475         size_t eptr, segptr;
1476         int i, j;
1477         u32 localctrl, sptr, len, tmp;
1478         u32 p2len, p2size, nr_seg, revision, io, sram_size;
1479
1480         rrpriv = netdev_priv(dev);
1481         regs = rrpriv->regs;
1482
1483         if (dev->flags & IFF_UP)
1484                 return -EBUSY;
1485
1486         if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
1487                 printk("%s: Trying to load firmware to a running NIC.\n",
1488                        dev->name);
1489                 return -EBUSY;
1490         }
1491
1492         localctrl = readl(&regs->LocalCtrl);
1493         writel(0, &regs->LocalCtrl);
1494
1495         writel(0, &regs->EvtPrd);
1496         writel(0, &regs->RxPrd);
1497         writel(0, &regs->TxPrd);
1498
1499         /*
1500          * First wipe the entire SRAM, otherwise we might run into all
1501          * kinds of trouble ... sigh, this took almost all afternoon
1502          * to track down ;-(
1503          */
1504         io = readl(&regs->ExtIo);
1505         writel(0, &regs->ExtIo);
1506         sram_size = rr_read_eeprom_word(rrpriv, 8);
1507
1508         for (i = 200; i < sram_size / 4; i++){
1509                 writel(i * 4, &regs->WinBase);
1510                 mb();
1511                 writel(0, &regs->WinData);
1512                 mb();
1513         }
1514         writel(io, &regs->ExtIo);
1515         mb();
1516
1517         eptr = rr_read_eeprom_word(rrpriv,
1518                        offsetof(struct eeprom, rncd_info.AddrRunCodeSegs));
1519         eptr = ((eptr & 0x1fffff) >> 3);
1520
1521         p2len = rr_read_eeprom_word(rrpriv, 0x83*4);
1522         p2len = (p2len << 2);
1523         p2size = rr_read_eeprom_word(rrpriv, 0x84*4);
1524         p2size = ((p2size & 0x1fffff) >> 3);
1525
1526         if ((eptr < p2size) || (eptr > (p2size + p2len))){
1527                 printk("%s: eptr is invalid\n", dev->name);
1528                 goto out;
1529         }
1530
1531         revision = rr_read_eeprom_word(rrpriv,
1532                         offsetof(struct eeprom, manf.HeaderFmt));
1533
1534         if (revision != 1){
1535                 printk("%s: invalid firmware format (%i)\n",
1536                        dev->name, revision);
1537                 goto out;
1538         }
1539
1540         nr_seg = rr_read_eeprom_word(rrpriv, eptr);
1541         eptr +=4;
1542 #if (DEBUG > 1)
1543         printk("%s: nr_seg %i\n", dev->name, nr_seg);
1544 #endif
1545
1546         for (i = 0; i < nr_seg; i++){
1547                 sptr = rr_read_eeprom_word(rrpriv, eptr);
1548                 eptr += 4;
1549                 len = rr_read_eeprom_word(rrpriv, eptr);
1550                 eptr += 4;
1551                 segptr = rr_read_eeprom_word(rrpriv, eptr);
1552                 segptr = ((segptr & 0x1fffff) >> 3);
1553                 eptr += 4;
1554 #if (DEBUG > 1)
1555                 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
1556                        dev->name, i, sptr, len, segptr);
1557 #endif
1558                 for (j = 0; j < len; j++){
1559                         tmp = rr_read_eeprom_word(rrpriv, segptr);
1560                         writel(sptr, &regs->WinBase);
1561                         mb();
1562                         writel(tmp, &regs->WinData);
1563                         mb();
1564                         segptr += 4;
1565                         sptr += 4;
1566                 }
1567         }
1568
1569 out:
1570         writel(localctrl, &regs->LocalCtrl);
1571         mb();
1572         return 0;
1573 }
1574
1575
1576 static int rr_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1577                              void __user *data, int cmd)
1578 {
1579         struct rr_private *rrpriv;
1580         unsigned char *image, *oldimage;
1581         unsigned long flags;
1582         unsigned int i;
1583         int error = -EOPNOTSUPP;
1584
1585         rrpriv = netdev_priv(dev);
1586
1587         switch(cmd){
1588         case SIOCRRGFW:
1589                 if (!capable(CAP_SYS_RAWIO)){
1590                         return -EPERM;
1591                 }
1592
1593                 image = kmalloc_array(EEPROM_WORDS, sizeof(u32), GFP_KERNEL);
1594                 if (!image)
1595                         return -ENOMEM;
1596
1597                 if (rrpriv->fw_running){
1598                         printk("%s: Firmware already running\n", dev->name);
1599                         error = -EPERM;
1600                         goto gf_out;
1601                 }
1602
1603                 spin_lock_irqsave(&rrpriv->lock, flags);
1604                 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1605                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1606                 if (i != EEPROM_BYTES){
1607                         printk(KERN_ERR "%s: Error reading EEPROM\n",
1608                                dev->name);
1609                         error = -EFAULT;
1610                         goto gf_out;
1611                 }
1612                 error = copy_to_user(data, image, EEPROM_BYTES);
1613                 if (error)
1614                         error = -EFAULT;
1615         gf_out:
1616                 kfree(image);
1617                 return error;
1618
1619         case SIOCRRPFW:
1620                 if (!capable(CAP_SYS_RAWIO)){
1621                         return -EPERM;
1622                 }
1623
1624                 image = memdup_user(data, EEPROM_BYTES);
1625                 if (IS_ERR(image))
1626                         return PTR_ERR(image);
1627
1628                 oldimage = kmalloc(EEPROM_BYTES, GFP_KERNEL);
1629                 if (!oldimage) {
1630                         kfree(image);
1631                         return -ENOMEM;
1632                 }
1633
1634                 if (rrpriv->fw_running){
1635                         printk("%s: Firmware already running\n", dev->name);
1636                         error = -EPERM;
1637                         goto wf_out;
1638                 }
1639
1640                 printk("%s: Updating EEPROM firmware\n", dev->name);
1641
1642                 spin_lock_irqsave(&rrpriv->lock, flags);
1643                 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1644                 if (error)
1645                         printk(KERN_ERR "%s: Error writing EEPROM\n",
1646                                dev->name);
1647
1648                 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1649                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1650
1651                 if (i != EEPROM_BYTES)
1652                         printk(KERN_ERR "%s: Error reading back EEPROM "
1653                                "image\n", dev->name);
1654
1655                 error = memcmp(image, oldimage, EEPROM_BYTES);
1656                 if (error){
1657                         printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1658                                dev->name);
1659                         error = -EFAULT;
1660                 }
1661         wf_out:
1662                 kfree(oldimage);
1663                 kfree(image);
1664                 return error;
1665
1666         case SIOCRRID:
1667                 return put_user(0x52523032, (int __user *)data);
1668         default:
1669                 return error;
1670         }
1671 }
1672
1673 static const struct pci_device_id rr_pci_tbl[] = {
1674         { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1675                 PCI_ANY_ID, PCI_ANY_ID, },
1676         { 0,}
1677 };
1678 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1679
1680 static struct pci_driver rr_driver = {
1681         .name           = "rrunner",
1682         .id_table       = rr_pci_tbl,
1683         .probe          = rr_init_one,
1684         .remove         = rr_remove_one,
1685 };
1686
1687 module_pci_driver(rr_driver);